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1.发明授权Shale stabilizing drilling fluids comprising calcium chloride and low molecular weight low charge cationicpolyacrylamide copolymers 失效包含氯化钙和低分子量低电荷阳离子聚丙烯酰胺共聚物的页岩稳定钻井液公开(公告)号：US06355600B1
公开(公告)日：2002-03-12
申请号：US09411346
申请日：1999-10-01
IPC分类号： C09K702
CPC分类号： C09K8/12 , C09K2208/18
摘要： A drilling fluid and method of using same. The drilling fluid comprises water as a continuous phase, an amount of calcium chloride, and a quantity of a polyacrylamide copolymer. The amount of calcium chloride and the quantity of polyacrylamide copolymer in the drilling fluid are sufficient to produce a rate of penetration approaching that achieved using a synthetic oil-based drilling fluid while preventing substantial screen blinding. In a preferred embodiment, the continuous phase also comprises a second amount of a monovalent salt effective to increase gas hydrate suppression and decrease density when compared to a fluid consisting essentially of only a divalent salt in the absence of the monovalent salt.
摘要翻译： 钻井液及其使用方法。 钻井液包括作为连续相的水，一定量的氯化钙和一定量的聚丙烯酰胺共聚物。 钻井液中氯化钙的量和聚丙烯酰胺共聚物的量足以产生接近使用合成油基钻井液达到的渗透速率，同时防止大量的筛网堵塞。 在一个优选的实施方案中，连续相还包含第二量的一价盐，当与不存在一价盐时基本上仅由二价盐组成的流体相比，这有效地增加气体水合物的抑制和降低密度。
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2.发明授权Water based fluids comprising multivalent salts and low molecular weight, low charge cationic polyacrylamide copolymers 失效包含多价盐和低分子量低电荷阳离子聚丙烯酰胺共聚物的水基流体公开(公告)号：US06855671B2
公开(公告)日：2005-02-15
申请号：US10095020
申请日：2002-03-11
CPC分类号： C09K8/12 , C09K2208/18
摘要： A drilling system fluid and method of using same. The drilling system fluid comprises water as a continuous phase, an amount of a multivalent metal, and a quantity of a water soluble polyacrylamide copolymer having a charge density of at least about 1%. In a preferred embodiment, the fluid also comprises a second amount of a monovalent salt effective to increase gas hydrate suppression and decrease density when compared to a fluid consisting essentially of only a divalent salt in the absence of the monovalent salt.
摘要翻译： 钻井系统流体及其使用方法。 钻井系统流体包括作为连续相的水，一定量的多价金属和一定量的电荷密度为至少约1％的水溶性聚丙烯酰胺共聚物。 在一个优选的实施方案中，与基本上仅在不存在一价盐的情况下仅由二价盐组成的流体相比，流体还包含有效增加气体水合物抑制和降低密度的第二量的单价盐。
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